Flat roof insulation solutions

Flat roof insulation for sound and warmth.

Discover flat roof insulation offering superior thermal, acoustic, and fire safety performance for both cold and warm roof systems.

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Flat roofs for energy efficient buildings, designed with safety in mind

The requirements for flat roof specification are changing. Buildings must deliver increasingly higher standards of energy efficiency and fire safety. Meanwhile, flat roofs are becoming more functional. They are now spaces for storage, recreation, and energy generation using photovoltaic (PV) panels and that comes with additional fire risk, making fire safety an essential part of your specification.

Knauf Insulation offers roof insulation with the highest Euroclass A1 (non-combustible) or A2 (limited combustibility) reaction to fire classifications according to EN 13501-1, for both cold and warm flat roof applications, including built-up metal roofs. Our products also deliver thermal and acoustic performance, supporting energy efficiency and occupant comfort.

Our Technical Services team are here to guide you through every step of the process.

Benefits of our flat roof insulation products

Thermal Performance

Thermal performance of the roof is essential for maintaining an energy efficient building.

Knauf’s mineral wool insulation is flexible, so it can adapt to minor imperfections in the substrate and maintain close contact with neighbouring materials.

These features of mineral wool help to reduce air gaps during installation and maximise thermal performance. This creates a more comfortable environment for residential, industrial, or commercial buildings.

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Acoustic Performance

Acoustic performance helps to protect occupants from unwanted noise entering the building through the roof.

This is particularly important in areas that experience heavy rainfall, or for buildings with metal roofs or that are close to airports.

Knauf’s flat roof insulation is manufactured from mineral wool, which provides the best levels of sound absorption and reduction compared to other mainstream insulants. This helps to reduce sound pollution, such as the drumming effects of rainfall.

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Non-combustible and Durable

Fire safety and durability are critical functions of modern flat roof design – particularly those with solar panel installations.

Knauf Insulation’s mineral wool insulation has the highest Euroclass A1 (non-combustible) or A2 (limited combustibility) reaction to fire classifications according to EN 13501-1, for greater peace-of-mind.

For warm flat roofs, we offer specific products with high levels of compressive strength and durability.

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